Catatumbo lightning (Spanish: Relámpago del Catatumbo) is an atmospheric phenomenon that occurs over and around Lake Maracaibo in Venezuela, typically over a bog area formed where the Catatumbo River flows into the lake. Catatumbo means "House of Thunder" in the language of the Barí people. It originates from a mass of storm clouds at an altitude of more than 1 km (0.6 mi), and occurs for 140 to 160 nights a year, nine hours per day, and with lightning flashes from 16 to 40 times per minute. The phenomenon sees the highest density of lightning in the world, at 250 per km. In summers, the phenomenon may even occur as dry lightning without rainfall.
The lightning changes its flash frequency throughout the year, and it is different from year to year. For example, it ceased from January to March 2010, apparently due to drought, leading to speculation that it might have been extinguished permanently.
